I found these Plano Boxes at Costco. I wanted them for Memoir 44 maps and other books. 5 colors and very well made.

These have no dividers for small bits and are not made for partitioning. They were designed for document storage. My Memoir expansions, Descent book and my ASL stuff fits nicely. The are hinged and have 2 nice securing closures. Maybe you can use these or not. $19.99 for bundles of 5 at Costco.